- both always run towards you.
- both can break bricks (or turn blocks in SMW)
- both die when stomped on three times
I have recreated the chargin' chuck in SMW by replacing the broozer's graphics with the chuck's. This is a short preview of it in action






Tips (optional):
1. You could make an event for the birdo hit sound to be played when chargin' chuck is killed.
2. The text documents 'npc-324' and 'npc-261' can be edited according to your preference.
3. Attached inside is another npc's graphics which is the bouncin' chuck. You can change it's death effect (effect-137) to become a blank image, and then make an event to cause a chargin' chuck to show when the bouncin' chuck is killed.
4. If you want to make a bouncin' chuck that is stationary, use graphics expansion and replace both of the chuck's walking sprites with its idle sprite in the second set of graphics (on the right of the first set of graphics).