>>21660198Blastoise: Water/Steel - Add Gyro Ball to its lvl up moves as well as Heavy Slam, Iron Head, Metal Claw and perhaps Meteor Mash.
Meganium: Grass/Fairy - even moar support moves: Aromatic Mist, Flower Shield, Charm. For attacking moves I would consider Draining kiss and Moonblast I suppose.
Typhlosion: Fire/Dark - Add the bite family of attacks as well as snarl and taunt. This new typing won't honestly do it any favours but I think its the most suitable to the design if we absolutely had to dual type.
Feraligatr: Water/Dragon really does seem the most logical choice considering it's existing movepool. Though I find the idea of dragon typing on a starter to be dangerous considering the resistances it would gain. Thankfully it would balance out for in game since Meganium would have the fairy typing I mentioned above. I would probably add dragon rage to its early movepool as well as Outrage later on.
Serperior: Grass\Dark would be my choice since it can learn Taunt and Torment as it is and it would still suit its snobby look. Would add the Bite series of attacks as well as Dark pulse, Embargo, Fake Tears, Flatter, Foul play, Nasty Plot, Pursuit, Snatch, Sucker punch and Knock off.
Samurott: Water\Fighting is the most suited choice by far. I would add Sacred Sword of course, Bulk Up, Close Combat, Counter, Low Sweep, Quick/Wide guard, Reversal and Superpower.