Two choices

[Smashley]

F.L.U.D.D.

/

 

[Gumball Machine]

Ness/Luigi

 

[PokemonMaster]

Luigi

Reshiram | Zekrom

 

[Gumball Machine]

Zekrom

Fox/Jigglypuff

 

[MCS]

Fox

Link | Young Link

 

[Gumball Machine]

Young Link

Link/Toon Link

 

[PokemonMaster]

Young Link

Magikarp Vs. Magikarp | Ditto Vs. Ditto

 

[Master Dimentio]

How 'bout Magikarp VS Metapod instead?

Taco|Burger

 

[Gumball Machine]

Burger

Metapod/Metapod

 

[Xiahou Ba]

Metapod

Kakuna/Metapod

 

[Gumball Machine]

Metapod

Nidoran (male)/Nidoran (female)

 

[Xiahou Ba]

Nidoran ♀

Fire Mario/Fire Luigi

 

[Gumball Machine]

Fire Mario

Voltorb/Foongus