Wormmon is the adorable Digimon partner to Ken Ichijouji. At first, Wormmon is pushed around by 'Kaizer' Ken, before sacrificing himself in the battle between Magnamon & Chimeramon. It's after that, Ken realises the wrong he's done, and Wormmon finally has his old Ken back.
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Wormmon's attacks are Sticky Net & Random Roll. He is a playable character in the Digimon Tamers Battle Evolution (Aka Digimon Rumble Arena), Digimon Battle Spirit ( & 1.5) and Digimon: Digital Card Arena (Battle). He can shinka/evolve into a variety of characters. His most common evolution is Stingmon. His 'proper' armor form was never actually used anywhere, but it's Puttimon. We do, however, see Shadramon (+Courage) and Quetzalmon (+Miracles) in the card game videogame.