S.P.I.K.E

I had many problems with the name of the GIR-Spike crossover.

In the case of GIR, the real name of the irken assistant model is SIR (standard information retrieval). In S.P.I.K.E case, the real name would be "S.I.K.E". I don't know what the P would stand for.

EDIT: Ok, I never thought I would ever need to edit this description, but remember just two lines above this one, when I said that I have no idea what the P would stand for? That was (*sigh*) supposed to be a joke/pun. Is my fault for making such terrible jokes/puns, but I'll explain it now because all the comments are coming up with words that the letter P could stand for.
See, in Invader Zim, when GIR is first introduced, he presents himself as GIR, and Zim ask what the G stands for; then GIR says he doesn't know (that actually made me laugh, in case you're wondering why I found it funny enough to make a parody of that single line). Anyways, is like Twilight receives her "sike" unit (that is just a contraction of "sidekick" BTW) and it presents itself as sPike, and Twilight would ask what the P stands for and whatever, nevermind, it was just an awful attempt as a joke.

But I'll admit that some of the words the letter P could stand for in the comments are pretty good. My favourite one various people have come up with is "Purple".

Invader Zim is property of his creator, Johnen Vazquez, and also Nickelodeon.
MLP: Fim is property of Lauren Faust and Hasbro.