Cache

Cache (キャッシュ) is the final boss from the game Rockman.EXE Phantom of Network, a NetNavi that manages the Cache Server, where all of the world's cache data is accumulated.

Rockman EXE Beast+
In the anime Rockman EXE Beast+, Cache was the one responsible for creating several duplicates of NetNavis (A.K.A Phantom Navis) using the cache data accumulated in the Cache Server. In Beast+ he can apparently turn NetNavis and humans into cache data to gain power. He seems to not be in agreement of how NetNavis and humans work together. He firstly spreads Phantom Navis around to wreak chaos and terror. Things escalate when he sets up a JammingMan within the SciLabs Network to block all jack-in and jack-outs around the Cyber World. After MegaMan, ProtoMan and SearchMan destroy it, he reveals himself and begins to transform all objects and living beings in the world into data to assimilate into him. He even can use the dispruting radio signals from the JammingMen to create fake perceptions of reality around people. In the end, however, he is defeated by both Lan and MegaMan in the final episode of Beast+, thus bringing an end to the series.

Triva

 * Some people say that Cache is similar to Lumine, from Mega Man X8.