I don't believe I unlocked any of the upgraded techs in my first playthrough, but out of the ones I had, I love the cherry bomb the most. I just love drawing it, is really useful in battle and it consumes very little ink.

My least favourite would have to be Inferno. It's unreliable (doesn't work nearly as much as I'd like), it really sucks up your ink and it's not nearly as versatile as other attacks. It's not horrible, but I didn't make much use of this one.

quote yello man

for me that is hard to use the slash i can never make a straitght line for soem reason

Use the Z button while painting if you want to draw a perfectly straight line.

Hm, it tends to work more often then not, but I still can't get it to work as well as any of the other attacks (which always work). I don't hate it, but it's definitely my least favourite.

It's probably just the way I draw it.