Trill.EXE

Trill is a baby NetNavi and then later a young child one, he is an anime-exlusive character that comes from the world of Beyondard a parralel world ruined by a Dimensional Area accident caused by that world's Mr. Wily.

He is known by the Zoanoroids as The Synchronizer for he contains the power of the Beast Factor, frequently throughout Beast he fuses with Megaman sending him into an uncontrollable Beast out state.

It's only later thanks to Iris.EXE that the beastout can be controlled.

Trill's last two apperances were in the final of episode of Beast when he said goodbye to MegaMan.EXE A presumed fake of him brought on by Cache's data in the last episode of Beast+ appears and saves Lan and MegaMan from their fate before disappearing once more.