Back in the day Japanese developers didn't have the budget or the control to make perfect Japanese-to-English translations... although probably no one really cared. They had to translate and export their games to the West as fast as possible.
So they can't be blamed for this really—but the results are too hilarious. We collected some of them below.
Bubble Bobble
source: Bubble Bobble intro
Metal Gear
source: The first few minutes of the game on the NES
Zero Wing
source: Zero Wing intro
Ninja Gaiden
source: Ninja Gaiden act 6 on the NES
Ikari Warriors
source: Ikari Warriors ending on the NES
Teenage Mutant Ninja Turtles
source: TMNT (Arcade) ending
Crime City
source: Crime City (Arcade) ending
Fatal Fury Special
source: Terry Bogard in Fatal Fury Special on the NeoGeo
Aero Fighters 3
source: Aero Fighters 3 (Arcade) endings
Super Chase
source: Super Chase (Arcade) stage endings
X-Men
source: X-Men Arcade
No text on the last one, but it's probably known by everyone. If not, check the source for some laughter. And of course, your submit picks are welcome with support that is visual.
