Here's why:
* Capsule Monster Coliseum is a different game: Yu-Gi-Oh! Capsule Monster Coliseum is a spin-off game focused on capsule monsters, not the traditional monsters you see in the main Yu-Gi-Oh! Trading Card Game. Blue-Eyes Ultimate Dragon is a traditional monster, not a capsule monster.
* Limited monster roster: The game has a specific roster of capsule monsters, and Blue-Eyes Ultimate Dragon isn't included.
Where you can find Blue-Eyes Ultimate Dragon:
* Yu-Gi-Oh! Duel Links: This mobile game features a variety of cards, including Blue-Eyes Ultimate Dragon.
* Yu-Gi-Oh! Master Duel: This digital card game is another place where you can play with Blue-Eyes Ultimate Dragon.
* Yu-Gi-Oh! Trading Card Game: The original and most popular way to play Yu-Gi-Oh!, you can acquire Blue-Eyes Ultimate Dragon by buying booster packs or individual cards.
Let me know if you have other questions about Yu-Gi-Oh! or other games!