Expanded well on what the first game did but also rid itself of the overly cumbersome dungeons. My main issue with this iteration was a mixture of the boss gimmicks being annoying (ToadMan, MagnetMan, ThunderMan) and the backtracking at the end of the game. It really expected you to venture all around the net again to find your next task which just made everything at Freezeman to the end game a bit more padded than it should have been.
This game was really weird because if you got rid of the insane amounts of padding and backtracking you'd have an excellent 10ish hour experience. But for whatever reason, they threw in massive sections of going back and forth through different areas just so they could pad out the length of the game. It sucks too because the Netopia and plane scenarios are easily the best parts of the series so far from what I've played, but they're sandwiched in between some of the most monotonous, boring sections I've ever experienced in an RPG. Still, this is a good game with some really funny degenerate combos like Tree Bomb + Prism, Gater, etc. Also the writing is honestly half the fun of this game, the dialogue is the perfect combination of intentionally and unintentionally hilarious.