Yeah, that misleading thing is intentional. Lol.
Anyway, as for me multiplayer on
Columns III isn't as fun as
Columns Crown since there is only one attack pattern to your opponent (bumps your opponent's field up) compared to freaking 32 attack of Column Crowns.
1. Barrier - Creates a one-time defensive shield.
2. Copy - Copies the rival's magic gem power.
3. Delete - Clears many jewels from your field.
4. Exchange - Switches field with your rivals.
5. Freeze - Stops your rival from rotating.
6. Gray - Turns your rival's jewels gray.
7. Hell - Adds 2 rows to your side and 5 to your opponent's side.
8. Invisible - Hides your rival's jewel drops.
9. Jynx - Adds 2 rows to you & 4 to your rival.
10. Laser - Erases a column of rival's jewels.
11. Meteor - Drops black rocks on your rival.
12. Nora - Completely clears your field.
13. One More - Gives your rival 4-jewel drops.
14. Press - Removes three rows from your screen.
15. Quake - Shakes up your rival's field.
16. Reverse - Turns your rival upside down.
17. Speed - Speed's up your rival's drops.
18. Triple - Takes away 3 rows from your field.
19. Up - Bumps your rival's field up 2 rows.
20. Vacuum - Steals bar energy from your rival.
21. Wall - Creates a wall in the rival's field.
22. X2 - Doubles the next magic gem drop.
23. Yellow - Gives you only yellow jewels.
24. ? ? ? - Triggers a random gem power.
I remember the most fun way
to annoy your opponent on Columns Crown is using
Exchange attack. After you got that exchange magic gem, ruin your own field as worst as possible, then switch your ruined field with your opponent. Of course you had to make sure your opponent doesn't have that exchange magic gem first since he/she would exchange back when that's happened.
The downside of Columns Crown is you'll need two GBAs and two cartridges, while Columns III only need 1 cartridge and 1 console (plus multitap if you want to play 5 persons mode).