Catto Mario is a Catto Boi based SMB1 romhack for the NES that makes simple yet fun changes to the level design of vanilla SMB1, this was a fan project that would be one time thing but is now going to become it's own series, please stay tuned for more if you like, we would love to bring you more entertaining stuff to play!
The Catto Boi series is owned by mango-ki.
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