Mrs. Grumplesrock is an instructor at the Manhattan Genius Institute of Students are genius she knows Spud was a genius appeared in A Befuddled Mind is Season 2.
- ↑ http://www.jeffgoode.com/tv/americandragon/characters/grumplestock.htm
- ↑ http://www.imdb.com/character/ch0388970/?ref_=nm_flmg_act_85
- ↑ http://www.behindthevoiceactors.com/tv-shows/American-Dragon-Jake-Long/Mrs-Grumplestock/
- ↑ http://www.imdb.com/name/nm0827565/?ref_=ttfc_fc_cl_t33