Action Blocks are an SMB styled toggle switch.
Looks[]

Action Block in the editor.
Action Blocks are a simple edit to the original Coin Block, They are 2 quads long and do not support sprite sheets in SE and CE and AE introduced sprite sheets.
Appearances[]

SE's Action Block.
1.6 - Didn't appear

CE's 'Questionable' action block.
SE - First Appearance

AE's Action Block with sprite sheet.
CE - Appeared
AE - Appeared
Right Click Menu[]
This entity doesn't have a right click menu in any version.
Linking[]
This item is only an Input meaning other items can be linked to it but the block cannot linked to other items.
Uses In Game[]
They should be placed on an empty tile.
They can be hit by Mario's head with or without a mushroom, they can also be triggered by a shell, thwomp, skewer, icicle and bomb in AE much like a Coin Block.
The blue and orange states indicate off and on, respectively.
Trivia[]
- They did not appear in the original game.
- They make no noise when struck, unlike a normal block.
- They can be activated by any enemy that collides with them, as well as Bowser.
- Despite which, they will not activate if a shell hits them from the side, unlike regular Coinblocks.
- They are technically considered I/O Objects, and will appear under that tab.