Here is the full list of all 40 Magnetis achievements.
Score 6000 points in Time Attack
Score 3000 points in Time Attack
Score 6000 points in Block Attack
Score 3000 points in Block Attack
Compete in 3 Players Team Play mode
Compete in 4 Players Team Play mode
Play in 4 Players Versus mode
Play in 3 Players Versus mode
Play in 2 Players Versus mode
Make a x8 combo in Cooperative
Score 15 000 points in Cooperative
Make a x4 combo in Cooperative
Score 10 000 points in Cooperative
Reach level 40 in Cooperative
Reach level 30 in Cooperative
Score 5000 points in Cooperative
Reach level 20 in Cooperative
Reach level 10 in Cooperative
Make a x10 combo in Cooperative
Make a x6 combo in Cooperative
Make a x2 combo in Cooperative
Make a x10 combo in Solo Modes
Make a x8 combo in Solo Modes
Reach Level 15 in Time Attack
Reach Level 10 in Time Attack
Reach Level 100 in Normal Mode
Score 30 000 points in Normal Mode
Make a x6 combo in Solo Modes
Reach Level 80 in Normal Mode
Score 20 000 points in Normal Mode
Score 15 000 points in Normal Mode
Reach Level 60 in Normal Mode
Score 10 000 points in Normal Mode
Reach Level 40 in Normal Mode
Reach Level 30 in Normal Mode
Score 5000 points in Normal Mode
Make a x4 combo in Solo Modes
Reach Level 20 in Normal Mode
Reach Level 10 in Normal Mode
Make a x2 combo in Solo Modes