SIBBLINGS

men, I do love Mabel and Dipper´s twin relationship but you can´t say the same of Dib and Gaz even tho they are awesome characters on their own, even tho if Dib did his best to get his sister back to normal on the episode of the "GAZ TASTER OF PORK" it was his damn fault for being a jerk over her.

Mabel and Dipper (c) Gravity Falls, Disney Channel, Alex Hirsch 
Gaz and Dib (c) Invader Zim, Viacom, Johnen Vazquez