Negative version of Numberblock 15. Also not an official character in the series, but since there's many fanmades, why not! Numberblocks is the best fandom :)
Numberblock 15 times 100, what else would you think Numberblock 1500 would be??? Also not an official character in the series, but since there's many fanmades, why not! Numberblocks is my only fandom BTW!