Question

What Pokemon have arena trap as an ability?

Answer 1

Diglett
Dugtrio
Trapinch
Source: http://pokemondb.net/ability/arena-trap

Answer 2

Diglet, dugtrio and trapinch.

http://bulbapedia.bulbagarden.net/wiki/Arena_Trap_(Ability)

Comments

Flygon and Vibrava can too if the trapinch did

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No it cannot. Flygon loses its old ability and gains levitate