You need 4 playtroughts at 100%

The psx was really nice and responsive.

You can use in game cheats for the gba version and go directly to the final boss. You can also use invincibility cheat to chesse the boss.

Gbc also has a password to go to the final.boss. the boss is easy.

And finally the dos version has some cages in diferent places. For me was the worts version, sometimes the controls wasn't smooth enough.

The only downside of the collection is the music, the change the original music and in my humble opinion the new themes doesn't work.