What's the theme of ^'s signature?

[OceanicWildfire]

So yeah, I looked by it appears there isn't one I the threads (so sorry if there is)
The title says is all. You gotta guess the theme of the poster above you's sig.
^Invisibility

 

[Eau Rouge]

Pokemon characters

 

[Okamidna]

A Naruto character gone British~

 

[OceanicWildfire]

^Pokemon Rivals

 

[97SaturnSL1]

characters that ^ finds irresitable

 

[Scarlet Sky]

A dedication to Dummies despite being a "No Big Dummies Zone".

 

[Serperiority]

Magic astronomy stuff.

 

[Ghetsis-Dennis]

^ School, Leaves in California, and Serperior.

 

[magikarp ftw]

ghost :O

 

[Bellossom]

You are a painter?

 

[Dolce]

^ Likes Team Rocket, is showing us their team, and has a funny quote I like. x3

 

[Jaden Yuki]

Halloween people and friend codes

 

[Ghetsis-Dennis]

Electric Type Pokemon.

 

[DracoMan]

Ghosts.

 

[TouyaShiro]

Redneck test.

 

[Bouffalant Herdier]

Legendary Pokemon.

 

[Ghetsis-Dennis]

VG classics w/ Pokemon.

 

[97SaturnSL1]

Halloween themed hitchikers

 

[Bouffalant Herdier]

Warning signs for ^'s least favourite Pokemon characters.

 

[TouyaShiro]

Streets of Pokémon.