The 6th gen is the 128-bit era, this is the time of the ps2, xbox, game cube and sega dreamcast, there was apperintly another console called the XaviXPort but i never heard of it. This era ended arounf 2005 when the xbox 360 came out.
iv always loved the game since the 1st one on PS1, i hope they will finish Ape Escape 4 soon! :D
(Whats ape escape? En.wikipedia.org)