Battletoads in Ragnarok's World is a port of the original NES 'Toads game to the Game Boy. Although it maintains the original's mechanics and focus on variety, it lacks two player support and has about half as many stages. The levels it does include are arguably the most memorable, such as the rappelling section, hoverbike stage, and snake area.
KEEP IT MOVIN' ALONG THE SURFACE, 'TOAD! AND WATCH OUT FOR THE PSYKO-PIGS!
Despite the title, this is a straight port of the original NES Battletoads but with missing content and stages. Ironically, Battletoads on the Game Boy is a completely original game.
The stages missing from this port include Surf City, Volkmire's Inferno, Intruder Excluder, Terra Tubes and Rat Race. The other seven stages are included and almost identical to the original, however.
Battletoads in Ragnarok's World is basically a port of the original NES game with half as many stages. Besides that, the gameplay, graphics, and sound are almost identical although there's no co-op. It's a shame so many stages got cut but it's still nice to have a portable version of 'Toads even if it's heavily scaled back.