Swamp Thing
Sets the Swamp Pledge effect on entry.
0 species 0 as main 0 as innate 6 battle AI weight, −2 to 10 — 6 is the untouched default
In detail
On entry, turns the opposing side of the field into a swamp for 4 turns. Pokemon on the swamped side have their Speed quartered. Does not activate if a swamp is already active there.
Who has it
No species has this ability, in either slot.