Bionicle

Easy wins:
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Rapidly press / to keep your shield on. 
Then, walk and fire. You will win. 
Note: This does not work on some Bosses.

Extra bonuses:
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Complete a level with all Lightstones collected as each Toa to 
unlock a bonus at the Extras menu.

Brown Rakhshi:
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To defeat the Brown Rakhshi, corner him on one of the floating wood 
raft-like objects. Then, shoot that one with elemental energy and you 
will win the level. 
Note: This is sometimes difficult to do.

Dodging attacks:
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When getting attacked (this works well when facing more 
than one opponent), jump and use your shield rapidly. 
The attack will completely miss and you will refill your 
Mana. Note: Do not do this with dragonflies and other 
flying enemies. It may work, but there is less chance of 
it working. For extra effect, while in the air press [Attack]. 
Since enemies are vulnerable when they attack you, they will 
get serious damage.