Sword Of Mana - Platform: Gameboy Advance

Expert enemies:
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Kill over 1,000 of the same enemy to replace it with an 
much more difficult black version of it in future encounters. 

Charge attack:
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To do a special charge attack, wait until your attack 
gauge is full and your character starts flashing green. 
Hold A for approximately two seconds, and release it. 
Your character will do a charge attack which varies with 
weapon to weapon.

Easy experience:
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In the room before battling Count Lee, there are four bats 
flying around. If you kill each one, you may get an object. 
After a few seconds, the bats reappear. Keep killing them 
and after awhile you will get easy experience.

Polter Boxes:
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Every time you defeat a Polter Box, you will get a very 
good item such as materials, seeds, icons and even coins. 
However, in some locations, you cannot find a Polter Box. 
Try to get it by hitting the Polter Box icon using the 
treasure chest left behind by an enemy that you just killed. 
Note: Only some treasure chest contain the Polter Box icon. 
Others will have spikes, stones etc.