There's no denying that the chemistry between Poison Ivy and Harley Quinn is palpable. Although the two have hit some roadblocks and speed bumps in the past, it's becoming apparent that these two are really meant to be. Their love is almost as strong as their combined powers and abilities, and that's saying something. Harley and Ivy are a power couple not to be trifled but they are not without competition.

Related: DC: 10 Times Harley Quinn And Poison Ivy Proved They Were The Real Deal

There are plenty of couples whose powers could challenge the Gothamites for the title of best power couple.  Of course, that's easier said than done considering that these two have held their own against the likes of Batman on multiple occasions. There are five reasons why these two are contenders for DC's strongest power couple and five other couples who could beat them.

10 HARLEY & IVY FOREVER: Flower Power Plus Flexibility

 Flower Power Plus Flexibility

The first thing that Harley brings to the team is her acrobatics. Harley's years as a gymnast have translated well to hand-to-hand combat, allowing her to fend off hordes of thugs and traverse treacherous landscapes. As for Pamela, she is infamously known for her chlorokinesis, or the ability to control plant-life. She can alter plant-life from the mightiest of oaks to the tiniest of seeds and command them to do her bidding.

Put them together and you get a psychotic clown that can perform stunts one would see at the Olympics and an ecoterrorist that can bind her foes in vines and turn urban jungles into actual jungles!

9 COULD BEAT HARLEY & IVY: Nightwing & Starfire

Starfire Nightwing

While Batman and Catwoman had potential, Nightwing and Starfire seemed like the better, more stable choice. Much like Bruce, Dick received the same training from his mentor and is just as skilled a combatant. That, and his prior experience of fighting Harley should give him the advantage.

Even if that wasn't the case, Starfire can take down any of Ivy's plants no matter how monstrous they are. With her Tamaranean physiology, she possesses the super strength and flight needed to uproot Ivy and her 'babies'. Comparing the two couples, only one is literally fueled by love.

8 HARLEY & IVY FOREVER: Their Pets Are The Best

When pitting people against each other, most wouldn't factor in pets. This is a special exception considering that Harley and Ivy don't have normal pets.

Throughout her various incarnations, Harley usually owns one to three pet hyenas that love her to bits and tear her enemies to bits. As for Poison Ivy, she almost always has gargantuan, man-eating plants at her disposal ready to do her bidding. Unless their opponents have weed killer or juicy steaks on hand, they will be in for some serious trouble.

7 COULD BEAT HARLEY & IVY: Big Barda & Mr. Miracle

Ivy might have an acrobatic clown for a girlfriend, but Big Barda has an escape artist for a husband. Both she and Mr. Miracle were raised on Apokolips with the physiology of a New God.  Tackling Harley shouldn't be a problem but Poison Ivy's plants will be a challenge.

Related: DC: 5 Marvel Heroes Big Barda Could Defeat (& 5 She Would Lose To)

It's a good thing the Apokoliptians love a challenge. Mr. Miracle could break free of any vines or roots binding thanks to his knowledge of escapology and his wife strength is renowned across the world. If he can resist the Anti-Life Equation, then he could also resist any of Ivy's charms or pheromones!

6 HARLEY & IVY FOREVER:  They Have Few Moral Restraints

Harley and Ivy

Some people follow a strict moral code, and then there are those who tossed their moral compass into the trash can because they got bored of it. Harley and Ivy lean toward the latter.

All that time with Joker must have rubbed off on Harley because she isn't afraid to be brutal in her brawls or fight dirty. As for Ivy, she's embraced her plant side and shows little disregard for humanity with the exception being children and Harley. Anyone who dares challenge these two better expect them to hit below the belt or turn them into plant food!

5 COULD BEAT HARLEY & IVY: Scandal Savage & Knockout

Scandal Savage & Knockout

Hearing that Vandal Savage has a daughter named Scandal might come as a shock to people, but not as shocking as the fact that she is in a polyamorous relationship with Knockout (a former member of Darkseid's Female Furies) and exotic dancer Liana Kerzner. Since Liana has no powers, any fighting that occurs will focus on Scandal and Knockout.

Scandal has been able to hold her own against the likes of Talia Al Ghul and Hawkgirl, so she shouldn't have any trouble fighting Harley. Much like Big Barda, Knockout is also a New God and more than capable of handling any of Ivy's pet plants. Knowing Harley, she'd probably want to set up a double date after all the fighting is over.

4 HARLEY & IVY FOREVER: They Have Poison Immunity

Poison Ivy immunity

One of the many of the risks that comes with living in Gotham City is the threat of drug exposure. Not the typical kinds of street drugs, mind you, but specialized ones like Joker's laughing gas or Scarecrow's fear toxins. Thankfully, Harley and Ivy don't need to worry about that since they are both possess toxic immunity.

Related: 5 Reasons Harley & Ivy Are Perfect Together (& 5 They Should Break Up)

Poison Ivy acquired this immunity along with her other abilities when she was doused in chemical. Later on, she made Harley immune so the two could team-up. This granted the two the advantage of surviving in toxic environments and resisting the damage of the viruses they either use or face in combat.

3 COULD BEAT HARLEY & IVY: Midnight & Apollo

Midnighter and Apollo

Around 2011, DC began integrating characters from Wildstorm into the mainline continuity and introduced readers to the on-again, off-again couple Midnighter and Apollo. Both of them were abducted by aliens as teens and experimented on, with Apollo receiving abilities on par with Superman and Midnighter getting implants that enhanced his abilities and allowed him to foresee battle strategies.

Harley's unpredictable nature might give her an edge against Midnighter, but Ivy will have trouble subduing a man that could match blows with Superman. Once Ivy is down for the count, Harley doesn't stand a chance against this duo.

2 HARLEY & IVY FOREVER: The Power Of Pheromones

Poison Ivy and Superman cuddled together

Harley is scrappy and a capable fighter on her own, but she doesn't hold a candle to the sheer might of Ivy's abilities. Ivy is practically a goddess in her own right, as she's capable of manipulating nature and people. In addition to her natural beauty, her mind-controlling pheromones have enamored countless people into becoming her minions.

Many of her victims, including Batman and even the mighty Superman, have risked and lost their lives to carry out her tasks. Only those with strong wills stand a chance at resisting her and even then there's a good chance they will have to fight a close friend or loved one.

1 COULD BEAT HARLEY & IVY: Superboy & Wondergirl

Superboy & Wondergirl

While they lack the skills and experience of their superior predecessors, Superboy and Wondergirl should never be underestimated. Connor Kent is just as powerful as Clark and unless Harley has packed some kryptonite, he's going to mop the floor with her. On the off chance that she does have some kryptonite, that means Harley and Ivy will have to contest with Cassie Sandsmark.

As the granddaughter of Zeus, Cassie is blessed with godly powers that can make short work of any of Ivy's plants. Thankfully, Harley and Ivy don't have to deal with the other Superboy any time soon!

Next: Every Relationship Harley Quinn Has Had