Unburden — Effect & Pokémon (Pokémon Champions)

Effect: Boosts the Speed stat if the Pokémon's held item is used or lost.

Description text is the mainline series' official wording. Pokémon Champions generally matches this behavior, though a few details may differ.

Pokémon with Unburden (4, by base stat total)

Pokémon	Type	HP	Atk	Def	Sp.Atk	Sp.Def	Speed	Total
Sneasler	FightingPoison	80	130	60	40	80	120	510
Hawlucha	FightingFlying	78	92	75	74	63	118	500
Slurpuff	Fairy	82	80	86	85	75	72	480
Liepard	Dark	64	88	50	88	50	106	446