The tip of its tail, which contains oil that is lighter than water, lets it swim without drowning.
In Japan, this card was available as an insert with the June 1999 issue of CoroCoro Comic. The English version of the card was available through Pokémon Leagues in December 2000. The before the first occurrence of "Energy" in the attack text is missing from this print. In addition, the damage is off-center. It was later reprinted in Japan in Pokémon Web.
In Japan, Marill and Togepi were the first Generation II Pokémon to be featured on a Pokémon card and the first to feature the aesthetic changes made to the cards in the Neo Era, released some six months before Gold, Silver, to a New World.... This remained true for the English print of this card, released approximately a week before Neo Genesis.