Dimensional Rift

Awkward

You walk into the portal and Claire immediately covers her eyes. Oh...you probably aren't supposed to be watching these hands do this. Uh...you aren't sure WHAT they're doing, but you get the feeling it is a two person activity not meant to be watched by others. They haven't noticed you. Maybe you should leave...

Awkward: "...Disgusting creatures! If they deserve their own pocket of space, I demand to see their power. I'm not paying you to just stand there, recruit! We're destroying these abominations!"

Summon Silver. Power him up with the Super Emeralds. He will simply play defense and protect the party from incoming projectiles by grabbing and returning them with telekinesis, and attempt to slow the impact of physical attacks by the hands.
Summon our Mewtwo Bison and give it the Guaranteed Critical Hit item. It will then teleport above the hands and land on them with a mighty foot stomp to crush them, then teleport back to the main party. It will then focus on repeating the teleport to stomp from above move on any of the hands' attempts to approach/attack the main party.
Then summon Magneto and the Giant Circular Saw. Magneto will use his powers to lift the saw with his mind and wield it as a weapon, causing it to fly and rapidly slash at the hands from afar.
Summon Wario and give him the supply of Pester Balls. He will leave the main party and get closer to the hands, chucking Pester Balls at them.
Then summon our Crazy Hand, who will attack Master Hand with repeated fast flying attacks.
Obviously, order Claire to attack the hands.
Awkward will summon the Twin Bow Herritt for himself, using it to induce a nightmare on Crazy Hand, then Master Hand.

You unleash a barrage of attacks on the hands and Claire manages to create a dark explosion around one of the hands with one hand covering her eyes. You then use the bow you have to trap the both of them in some kind of nightmare. Neither one seems to be moving. They're both just floating in place now. Oh, wait, you can hear them screaming. Or at least you can hear Master Hand screaming. Something about rescuing Cray-Baby.

You copy Master Hand and Crazy Band's abilities before brutally murdering the two lovers. This area feels really lifeless now. And kind of lonely.

(What abilities exactly, or literally all of their abilties?)

Return through the portal.