McDonald's is celebrating the 25th anniversary of Pokémon with a special Happy Meal promotion. However, some fans are taking the phrase "gotta catch em' all!" a bit further than expected.Select locations are selling Happy Meal boxes that look like Pikachu's face. They also come with 50 collectible Pokémon cards, including some rare holographic cards, leading some collectors to buy large amounts of the children's meals so they can collect all the cards. Some fans are waking up early so they can be the first in the stores and buy all the Happy Meals, while others are buying the boxes but throwing out the food. This has led some McDonald's to limit the number of Happy Meals a single customer can buy at a time. Some of the card stock is even being sold online in the boxed packaging for $1,000.RELATED: More Pokémon Let's Go Games Could Fix the Series' Biggest Problems

Pokémon cards are extremely popular, with rare cards often going for hundreds of thousands of dollars at auction houses. Recently, a Charizard #4 first edition base set rare hologram trading card sold for over $105,000, while a Secret Super Battle No. 1 Trainer hologram promo Trainer trading card went for $90,000.

KEEP READING: Pokémon: Jessie's Contest Career Is the Team Rocket Member at Her Best

Source: Polygon