Haven't seen Gundam, but I remember watching its parody in one of Gintama's episode
https://www.youtube.com/watch?v=eJi9YIJ2350I did watch a few mecha animes tho(FLCL and Gurren lagann being one of my favorites in this genre). FLCL is the most bizarre and perkiest anime for me(probably because I was high while I watched it?will have to rewatch it if I get time
). If Cronenberg ever makes an anime, it will be something like FLCL