Oh hey Lonely Goomba reviewed Wario World now...

[CM30]

Seems pretty neat:

 

[Hotel Horror]

It's always a treat when the dude uploads more Wario content. His Wario videos are the goat!

 

[Hotel Horror]

Goddamn we got robbed with the final boss. The Japanese version was way cooler! Makes me wonder if anything else got changed.

 

[CM30]

Goddamn we got robbed with the final boss. The Japanese version was way cooler! Makes me wonder if anything else got changed.

Yeah the final boss is way cooler in the Japanese version.

Other differences are more minor though:

Wario World - The Cutting Room Floor

tcrf.net

Apparently the only reason the Black Jewel boss got reworked was:

According to Treasure boss Masato Maegawa, the "main programmer" on the project was "particularly attached" to the final boss, hence the additional development for the Japanese release.

 

[The 3rd Wario Brother]

Now that's a name I haven't heard in years. So many old yt channels like this to check up on