Very clever. I'm wondering something now that I may want to test later. What this is exploiting is more of an oversight than a glitch.
The higher the difficulty setting, the greater the reward in SD Points when you defeat a boss monster. For that specific monster, on Hard mode, the player receives 3 points, on Evil, 4, and most likely, on Chaos, 5 (or perhaps more). In the DS mode at the arena, the boss is considered "defeated" when you pull off the DS. Most of the boss monsters have been correctly modified such that they no longer reward the player with points for the victory, but the Cave Head appears not to have been. A very nice find. This could make my next replay of the game much more amusing. ^_^
Thanks, it looks like a glitch to me, I dont think namco would like to go and add easy gotten SD points over there XD And this makes the game very fun after you get SD mode (imagine woodrow with phoenix SD before he gets LV3 BC!)
You can add extensions of lions skills by executing the skill in succesion (like pressing O again after doing majinken)