Try 'Em Items Stage is a type of Special Stage. These stages reduce Item cost to 0, allowing players to freely test out items without having to use Coins (even if the player has some items in possession, the game does not use them). Some of the more recent events even have an attempt cost of 0 Hearts!
Wobbuffet is well known as a chance to score very high combos (if all the items are used) as a forced 3-Pokémon Stage with no disruptions and instant Mega Evolution. This is probably the easiest way to complete missions requiring high combo count.
As of the 3DS v1.3.28 (11/15/2016) and Mobile v1.6.12 (11/15/2016) updates, Wobbuffet and Carnivine have become regularly occurring events, alternating every week and lasting for a week each. Like their previous events, items and attempt cost are free.
|Event Duration||Free Items||Notes|
|32px Wobbuffet||09/20/16 to 10/03/16||Costs 0 per attempt|
|Carnivine||09/06/16 to 09/19/16||Costs 0 per attempt|
|Carnivine||08/09/16 to 08/22/16||Costs 0 per attempt|
|32px Wobbuffet||07/26/16 to 08/08/16||Costs 0 per attempt|
|Carnivine||05/24/16 to 06/06/16|
|32px Wobbuffet||02/16/16 to 03/07/16||Mobile only|
|Carnivine||02/02/16 to 02/15/16|
|32px Wobbuffet||08/31/15 to 09/04/15||Mobile only|
|Carnivine||08/31/15 to 09/11/15||3DS only|
|32px Wobbuffet||07/20/15 to 08/14/15||3DS only|