MegaMan NT Warrior (2002)

Season 2: Episode 15

When Dex does a delivery for Yahoot's curry shop on Jawaii Island, the customer cons him into trading the food for a mysterious box. Yahoot scolds him for not collecting the cash, but soon finds out the seemingly worthless box is actually a powerful NetWrecker machine, capable of altering a NetNavi's data and increasing its power and size to unbeatable proportions! When Lan and the gang land on the island for a visit, he and MegaMan soon find themselves in a NetBattle against Dex and his amazing machine! In his efforts to finally defeat Lan, Dex boosts up GutsMan's power, but he loses control of the big metal ape, sending GutsMan stomping through the streets with Roll as his prisoner. This ""Incredible Guts"" seems unstoppable, and worse yet, nobody knows how to change him back!!