He kidnapped Trini 's scientist uncle for his invisibility potion ; however , it had been accidentally left at the Youth Center , making the kidnapping pointless .
Dark Warrior ( voiced by Tom Wyner ) - A stealthy ninja monster created by Finster .
Finster kidnapped Trini 's scientist uncle for Finster 's invisibility potion ; however , it had been accidentally left at the Youth Center , making the kidnapping pointless .
Dark Warrior ( voiced by Tom Wyner ) - A stealthy ninja monster created by Finster .