Monster Go! Go! Go!! is a hack of The Smurfs 3 released in the late 1990s for the Game Boy Color. The Smurfs 3 was originally in monochrome, but was colorized in this hack - it was later re-released officially in color as The Smurfs Nightmare, and a subsequent version of the hack was based on this release.
Almost all of the graphics from the original game are replaced, and so does the intro and ending text. Bizarrely, the intro text appears to be replaced with a poorly translated version of My Heart Will Go On by Céline Dion. Aside from the title screen, the game's use of color is limited, which gives it the appearance of a Super Game Boy game. The game suffers from extreme slowdown, running consistently at about half speed, possibly due to the colorization process.
Pokemon Action Chapter
Kǒudài Guàishòu Dòngzuò Piān (口袋怪獸 動作篇) is a hack of the colorized The Smurfs Nightmare release. Unlike Monster Go Go Go, most of the graphics are unchanged; it only replaces the title screen and Pikachu sprite, as well as other miscellaneous graphics. The intro text also remains intact..
This version is not to be confused with The Pikachu Nightmare which is an entirely separate hack, possibly homebrew in origin, with a completely different Pikachu sprite and an only slightly modified title screen.
Monster Go! Go! Go!! II
Released some time later is a second Monster Go! Go! Go!! game, this one a hack of Kirby's Dream Land 2 (Kirby of the Stars 2). It is less extensive than the first, only replacing Kirby himself and not any other elements. Like its predecessor, it is also converted to color, but does not seem to suffer from any slowdown. It is much rarer than the first and is currently undumped, but there is gameplay footage of it online .
Monster Go! Go! Go!!
Monster Go! Go! II
- The game was reported on in Nintendo 64 Magazine in August 1999, meaning the game was released by that point . It is unlikely it came any earlier than '99.
- 怪獸 Go!Go! Go!! and its sequel were released in the same striped "New GB Color" carts as some of Vast Fame's earlier games. 怪獸Go!Go! Go!! also was released in a "Game Amy" cart, which a few Vast Fame games were known to be released in. 怪獸 Go!Go! Go!! also has a title screen that appears to have been drawn in PC Paint. Finally, both games are colorized hacks of monochrome Gameboy games, like Vast Fame's fighting games. These traits have in the past caused some to believe that Vast Fame was related to the creation of these games, however this is no longer commonly believed.