Actives weak to each other

[Kirlia7755]

This is a thread where you put an "A" type pokemon weak to "B" type and a "B" type weak against "A" (Resistances are allowed, too)

Heres some

Gligar UF- F type weak to L
Almost any L type- L type weak to F

Sceptile EX- G type weak to G, R (also if 2 Scep EXs battle each other)
Larvitar- R type weak to G

Almost all psychic pokemon (self explanatory)

Weezing- G weak to P
Gardevoir EX- P weak to G

Mewtwo Delta- R weak to P
Metagross HL- P/M weak to R

Gligar Neo Destiny- F resistance F

Know any others?