This patch shoehorns (one of) the official translations into the Japanese game. It was edited minorly to remove obvious typos, and some redundant lines were dropped in the interest of all the important dialog getting stuffed in there (Get a high score, and try to get a high score!). Where text needed to be localized the original style of “talking down to a 7 year old through a language barrier” was utilized. Resisted the urge to alter existing dialog, so yes, “time attack” remains localized to “training”.

The Japanese game has a number of notable differences. There is a carrot in each world to collect, unlocking two minigames and…something else! Several rooms are completely different, the “boss rush” is more difficult, powerups appear in single player, there’s two more characters, and 1P can play multiplayer against up to three COMs. There’s several internal differences too, like how it doesn’t bork the save commands and isn’t silly about controller paks. Messy code though; honestly not certain if v1.1 fixed more bugs than it introduced–script included.