Last time I checked electric attacks couldn't harm ground type pokemon.
Tyrantrum is an electric/dragon type.
For dual-matchup types I was under the impression that as long as one of the types is unaffected by a move, that would take priority over the type
Tyrantrum is an electric/dragon type.
For dual-matchup types I was under the impression that as long as one of the types is unaffected by a move, that would take priority over the type