Does 10 damage to each Benched Pokémon (yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.)
The card ID of the Holofoil print is B-90. The card ID of the Non Holofoil print is B-90-#. On the Non Holofoil print, the short strip contains Pokédex information and a brief card summary. There is no long strip for this card. The species, height, and weight are present on the Holofoil print.
This card was included as a Holofoil and Non Holofoil card in the Expedition Base Set, first released in the Base Expansion Pack in Japan. The symbols within the Energy costs on both prints are larger than they should be. The Non Holo print was one of seven test cards made by Wizards of the Coast before the expansion's release. These cards have "For Position Only" print on the illustration in white, "Medium" printed below the e-Reader symbol, a long e-Reader data strip, no "ID:" before the card ID, and a Wizards copyright instead of Nintendo. This print has the Energy, name, and damage of Mud Slap oriented lower to the line break and the name oriented to the left.