Actually this fan video was created as a promo for a webcomic called 『サ ト×ピ カ』 (Sato and Pika). It uses MOSAIC.WAV's 「ガチャガチャきゅ～と・ふぃぎゅ@メイト」 which originally was used as the intro to the game 「ふぃぎゅ@メイト」 but later remixed in 2007's "Future-Fiction: AKIBA-POP!!". The theme, along with Love Cheat!, is definitely one of their most popular creations. In the fan video, you can spot references to many games and anime series, Pokémon of course but also "Higurashi no Naku Koro ni", "Lucky Star" and "JoJo's Bizarre Adventure". But ultimately what makes this video so interesting is that the original MOSAIC.MOV creation featured the game's heroines in capsule balls; the concept is all but a shoe-in for a Pokémon caricature. For comparison's sake, here it is.
I'm not a big fan of eroge but I'd be a liar if I said these intros don't make me want to play the games!