As long as Unown [C] is your Active Pokémon, whenever your opponent's Active Pokémon tries to retreat, flip a coin. If heads, put 1 damage counter on that Pokémon. Apply Weakness and Resistance.
It is believed that the variety of types of this Pokémon were created by evolutionary adaption, as each possesses a different ability.
いくつか種類がいるのは、それぞれ異なる能力を持っているからだという。
Trivia
[Chase] says to apply Weakness and Resistance when putting 1 damage counter on the target. Placing damage counters is not doing damage and isn't affected by Weakness and Resistance.