What's the biggest thing u've seen in a Anime? I'll give props for the best answer!!☆

if you're talking about size
for robots , i think psycho gundam mk2 is the biggest
biggest monster , bahamut from advent children
biggest object , maybe a space colony ??

By big i guess u mean the best. 1. When an series has been around since the late 90's and had just finished a month ago.
2. when the creator of an anime guest stars as a character in an episode!

Death Note episode ? :Light and Light's girl friend are finaly taken out of restraints and are bring driven somewhere by Light's dad.But out of nowhere Lights dad turns under the high way where knowone's around and pull's out a gun!!"dad what are you doing!"say's Light as his dad holds a gun up to Lights head!!! "dad way are you doing this!!!" "I was told to!!" "Good by Light!!!!" BOOM........ It was fake!!!!!!!

Super Tenga Toppa Gurren Laggan Is 5 Times Bigger Than The Universe

super tengan toppa gurren lagann

This titan lol