>>11943436Dragon Quest II (Enemies give more EXP in NA version.)
Dragon Quest III (Enemies give more EXP and gold in NA version.)
The Magic of Scheherazade (Leveling up takes much longer in the JP version, and the map is bigger and more complex.)
MOTHER (Various maps were simplified in NA version. NA version went unreleased, but the intention is evident from the proto.)
Contra (1st loop in JP version is 2nd loop in NA version.)
Kid Icarus (Significantly nerfed final level. Best ending requirements nerfed.)
Super Mario Bros. 2 (lol)
Super Mario Bros. 3 (Getting hit while powered up reverts you to Super Mario in the NA version and Small Mario in the JP version.)
Ghosts'n Goblins (In the NA version, the continue option is in the menu. In the JP version, its locked behind a code, meaning using it is cheating.)
Gun.Smoke (Same as above.)
Ikari III: The Rescue (JP version gives you three continues. NA version gives you unlimited.)
Karnov (JP version gives you two continues. NA version gives you unlimited. Continues in the JP version require a code, so using them is cheating anyway.)
Mega Man 2 (Adds an easy mode to the NA version under the title "NORMAL." "DIFFICULT" is the only difficulty in the JP version.)
Castlequest (You get 50 lives in the NA version but only three in the JP version)
Adventures of Lolo (In Japan, this series is known as Eggerland and has more than twice as many games. The NA games are essentially "best of" level packs from the JP games. The JP games have exclusive levels that are much harder than anything in the NA games.)
Adventures of Lolo 2 (See above.)
Adventures of Lolo 3 (See above. Also, bosses have half as much HP in the NA version.)
Kirby's Adventure (Boss rush in JP version gives you a full heal after fight #5. This is removed from the NA version, making the only challenging thing in the game way harder.)
Bubble Bobble Part 2 (Rounds were edited in the NA version to have fewer enemies.)
I'm too lazy to get to 50 but you get the idea.