Mascots are characters that were introduced in 2012. here are some of the meetable mascots.
Fuzzy the owner was a test mascot. and appeared in the volume 1 comics, which are very old.
X-Treme floffle was a floffle that you could meet and would appear in the comics.
Uncle amigo was a "Amigo mascot" which you could meet. He would make very rare appearances in older comics.