Parents: Infernape + Lopunny
Shared egg group: Field, Human-Like
Offspring name: Loppunape
New type: Fire/Normal
New base stats: 80/100/87/89/93/116 (BST: 565)
New ability and desc: Blaze + Cute Charm = Tinder: Fire- type moves have an added 30% chance of causing infatuation
Notable moves: Swords Dance, Return, Flare Blitz, Fire Blast, Elemental Punches, Slack Off, Taunt, Will-o-Wisp, Close Combat, High Jump Kick, Mach Punch, Low Kick, Encore, Nasty Plot, Calm Mind, Bulk Up, Agility, Baton Pass, Stealth Rock, U-Turn, Hone Claws, Earthquake, Power-Up Punch, Stone Edge, Focus Blast, Vacuum Wave, Gunk Shot, Grass Knot, Healing Wish, Endeavor, holy GUAC this thing's movepool is crazy diverse
Role identification: It has reasonable offensive stats and just enough bulk to run a decent defensive set. Defensive Support Infernape seems to be all the rage in OU now, and this fusion looks like it could do that job even better. But let's be real here, you're just gonna Mega Evolve it...
Parents: [MEGA]
Shared egg group: [MEGA]
Offspring name: Mega Loppunape
New type: Fire/Fighting
New base stats: 80/160/97/89/93/146 (BST: 665)
New ability and desc: Tinder --> Scrappy
Notable moves: Swords Dance, Return, Flare Blitz, Fire Blast, Elemental Punches, Slack Off, Taunt, Will-o-Wisp, Close Combat, High Jump Kick, Mach Punch, Low Kick, Encore, Nasty Plot, Calm Mind, Bulk Up, Agility, Baton Pass, Stealth Rock, U-Turn, Hone Claws, Earthquake, Power-Up Punch, Stone Edge, Focus Blast, Vacuum Wave, Gunk Shot, Grass Knot, Healing Wish, Endeavor...
Role identification: There's like a million different things you can do with Mega Lopunnape. An offensive set is the most obvious and straightforward option, given its obscene Attack stat, blazing Speed and fantastic ability. It lacks Mega Lopunny's perfect neutral STAB coverage, but it has far greater super effective STAB coverage, so make of that what you will.
That being said, a defensive set is also viable. It's decently bulky, and it has access to a lot of support options (see above), including reliable recovery in the form of Slack Off. It also has the ability to Baton Pass just about anything, given its access to Swords Dance, Nasty Plot, Bulk Up, Calm Mind and Agility.
Or, give yourself a Stealth Rock lead and use it in conjunction with Taunt and Endeavor. The possibilities are just endless.
Parents: Blastoise + Masquerain
Shared egg group: Water 1
Offspring name: Blasterain
New type: Water/Bug
New base stats: 84/81/91/92/103/79 (BST: 530)
New ability and desc: Torrent + Intimidate = Sea Monster: Lowers opponent's attack one stage upon switching in. Water-type attacks are boosted 10%.
Notable moves: Rapid Spin, Defog, Sticky Web, Scald, Bug Buzz, Roar/Whirlwind, Roost, Hydro Pump, Quiver Dance, Giga Drain, Baton Pass, Infestation, U-Turn, Stun Spore, Tailwind
Role identification: Here's the funny thing about Blasterain: it has the exact same BST as Blastoise. Literally.
So if it doesn't gain much stat-wise, what does it gain from fusing? The answer, of course, is movepool. Blasterain is actually a pretty tight support mon, with access to both Sticky Web and Rapid Spin, reliable recovery (Roost), U-Turn to preserve momentum, and Infestation for trapping purposes. It also has a pretty tight defensive typing; it gains a weakness to SR with the addition of a Bug type, but it also gains useful resistances to Fighting and Ground, two omnipresent offensive types.
But Blasterain's true appeal comes from its sweeping set, and if you want that, you're better off mega evolving it...
Parents: [MEGA]
Shared egg group: [MEGA]
Offspring name: Mega Blasterain
New type: Water/Bug
New base stats: 84/101/111/142/113/79 (BST: 630)
New ability and desc: Sea Monster --> Mega Launcher
Notable moves: Rapid Spin, Defog, Sticky Web, Scald, Bug Buzz, Roar/Whirlwind, Roost, Hydro Pump, Surf, Quiver Dance, Giga Drain, Baton Pass, Infestation, U-Turn, Stun Spore, Tailwind, Energy Ball, Aura Sphere, Dark Pulse, Dragon Pulse, Ice Beam
Role identification: This is where Blasterain really shines. It has a hefty 142 SpA stat, a solid defensive spread of 84/111/113, and a pretty good defensive typing. All perfect ingredients for a Quiver Dance set.
Unfortunately, as of the new Baton Pass clause, passing Quiver Dance is no longer an option, but that's okay, because Blasterain has more than enough power to finish the job itself. Your standard set is probably going to include Quiver Dance, Roost, Scald And Bug Buzz; combined, these moves will make Blasterain very difficult to revenge kill once it starts dancing. Scald will burn any incoming physical attacker, and Quiver Dance already boosts its Special Defense.
They're so different, and yet they harmonize so well. Blastoise x Masquerain OTP.