Yeah they are cool, but being 3rd party kills their chances.
Better pictures.
And here is a moveset I made for them awhile back.
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A- Bub and Bob do a punch combo.
A+Up Bub and Bob do a headbutt attack.
A+Down Bub and Bob do a low kick.
A+Side Bub and Bob attack with thier tails
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Air
A-Bub and bob they do a spin attack that hurts all that make contact.
A+up Bub and Bob do a flip kick
A+Down Bub and Bob attack attacks multiple times with thier feet
A+Side Bub and Bob do a side kick
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Running+A Bub and Bob use the running shoes from their game and do a running dash that turns into a blur.
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B- Bub and Bob blow rapid amounts of bubbles that harm on impact. Hold to make bigger stronger bubbles. (can control the larger ones). (may catch opponent in bubble)
B+Up Bub and bob form a bubble around themselves in order to float for a limited time.
B+Down Bub and bob form a bubble shield that reflect attacks back.
B+Side Bub and Bob blow two random different bubbles with different power (electricity strikes the stage if its popped). (fire covers the ground for a limited time) (water sweeps away opponent causing them to lose control for a while and lose one jump).
Alternate B+down Bub and Bob Blow a random bubble it forms around them, will burst and do a random effect (see B+Side) for the bubbles
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Smash attack+Up Bub and Bob Make a sweeping motion making a blue/green aura
Smash attack+Down Bub and Bob Charge up a single giant bubble that you can control.
Smash attack+Side Bub and Bob attack with a rainbow beam (borrowed from rainbow island).
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Taunt- they drink a potion, and turn human for a second.
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Final Smash- Bub and Bob sprays a large amount of bubbles on the stage. They all float upwards, and burst. The screen turns to a whitish tint, and everyone on screen is damaged
(Another idea)Final Smash- Bub and bob blows a huge random bubble (Fire/electrict/water... so on). it bursts and causes damage to all. (see Side+B for ideas on the bubbles).