Getting any one level-up type to level 40 gets you a special accessory:
Warrior - General Crest - +50 Def
Monk - Dragon Ring - +50 Pow
Magician - Rune Earrings - +50 Int
Sage - Code Bead - +50 Mag
Thief - Wishbone - +50 Agl
Random - Crystal Ring - +20 in all stats
Black Monsters
Defeat 999 of any regular monster to turn it into a Black monster. Black monsters have high stats and can drop Altena Felt and Crystals which make the most powerful equipment in the game.
Magic Rope
Use the Magic Rope to the last Goddess Statue visited.
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.
Expert enemies
Kill over 1,000 of the same enemy to replace it with an much more difficult black version of it in future encounters.
Easy experience
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
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.
Escape The Mana Shrine
Get past the mana Sanctuary easily - after you go past the gold statue and the hot house head (by screen)north, east, south, west, west, north.
Fake Bait
This is difficult to do, but it works if activated correctly. If a Magic detecting monster is coming, switch to your knucks and use a magic move, make it miss the magic detector and hit it from behind. You will have about 5 seconds to run. He will be focused on where the attack came from. Thinking it came from behind, he should walk away for a bit.