The complete Pokemon Diamond and Pearl pokedex, part 6

Pokémon Name: Munchlax
Type: Normal
Classification: Glutton
Pokédex Number: 112 Sinnoh / 446 National
Ability: Thick Fat – Fire and Ice attacks do 50% damage; Pick Up - May find items after battle
Dream World ability: Gluttony – Eats held berry when 50% HP remains instead of 25%
Useful Attacks: Swallow
Location Found:
D/P/P: Sweet Honey trees (extremely rare)
HG/SS: Pokewalker - Quiet Cave, Winner's Path
D/P/P/HG/SS: Bred from Snorlax holding Full Incense
B/W: Undella Town (trade NPC a Cinccino for a Munchlax, Summer only)

Munchlax is the prevolution of fan favorite Snorlax, perhap the most American of Pokémon. Try not to imagine it, but when two of those morbidly obese Pokémon mate in the presence of the Full Incense, a Munchlax hatches from the resulting egg. Munchlaxes don't have the bulk to hibernate like their fatty fathers, and so they spend all their time gobbling down food to widen their waistline, so one day they too can spend all day sleeping and obstructing roadways.

Evolves into Snorlax when happy.