User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4933023-20121014232416/@comment-4212769-20121019001631

"Pseudo" means "pretend to be" ("mimic" isn't too false) but also "false" or "fake" actually. "Being like" or "similar to" is the false translation.

Pseudowyvern actually means they aren't really "Wyverns" in traditional sense as they don't really fit in the description them means two legs and two wings. So they are "fake" Wyverns or "pretend to be" Wyverns again in traditional sense.