DERP OF THE WEEK TRIVA (Taken from Bulbapedia):
Slaking has the third highest base Attack of any Pokémon in any game. It is tied with Regigigas and is surpassed by Rampardos and Deoxys's Attack Forme.
At 670, Slaking has the highest base stat total of any non-legendary Pokémon, tying with the legendary Pokémon Groudon, Kyogre, and Regigigas.
Although Slaking is said to slack off like Slakoth, it gains a higher speed stat upon evolving from Vigoroth (although Vigoroth does not have Truant).
In double and triple battles, one can nullify Slaking's Truant ability by using either Skill Swap or Gastro Acid. Several trainers in Pokémon Emerald use this power, including Norman during the player's rematches with him. Cipher Head Evice is the very first Trainer in any game to use this tactic. Without Truant, Slaking can make full use of its impressive stats. This can also be done in single battles by using a contact move on a Pokémon with Mummy. Despite its Pokédex entries saying that it is saving energy for striking back, it is no less powerful without its ability.
Slaking is commonly mistaken as a pseudo-legendary Pokémon because of its incredibly high base stats, however, it differs from them in its lack of a secondary type and base stats not totaling 600 (instead being above 600).
In Ruby and Sapphire, Norman has two Slaking, one at level 28 and another at level 31. This is technically impossible, as Vigoroth evolves into Slaking at level 36. The problem still remains in Emerald, but Norman only has one Slaking, at level 31.
Despite being named Slaking, it has a 50% chance of being female. It is also true for its Japanese name, Kekking.
In both the handheld and console games, Slaking is always seen lying on its left side with its left arm propping up its head.