I have become a Capcom fangirl.
MMX1 - Beat this with no upgrades besides forced ones, no heart tanks/subtanks, buster only, Chill Penguin stage last, etc., i.e. as hard as the game can get. Fun. First time I'd ever beaten Sting Chameleon with the buster (without stupid amounts of health/armour at least), so that was satisfying to finally do.
Revised opinion of bosses: Sting Chameleon > Spark Mandrill > Armoured Armadillo > Launch Octopus >>> Boomer Kuwanger > Storm Eagle > Flame Mammoth > Chill Penguin. There's a large drop in the middle.
Then the Sigma stages. Wow, stage 1 is much harder without special weapons to own everything's faces. Vile sucks and got beaten first try. Spider was ARGH, nothing new, just needed to get very, very good at reading his patterns and dodging his minispider barrage, and took a lot of tries.
Second stage is easy. Sub-bosses are easy. Rangda Bangda (awesome name) is decent but fundamentally no different than before. Watch out for the red eyes! And that's about it. Took a few tries but I always got to him with lots of lives so it was okay.
Third stage... surprisingly, the hardest. Because bustering the four best bosses in a row with only two health recharges the entire stage is painful. Usually by the time I got to D-rex I only had one life, and with his increased durability and damage I finally saw him do things besides fail, so this level took quite a bit of time to beat. D-rex still isn't ultimately much; dash-jump deals with most of his attacks and the charged shot, while somewhat dangerous, lets you hit him like half a dozen times during the charge time and aftercharge.
Sigma's dog is a fucking pain in the ass. I finally got good enough at him that I could usually keep him down to one hit against me! If he hit me twice I usually just suicided. Oddly, he hit me twice the time I ultimately won and I decided to go on anyway. Besides that, mostly about staying in the top corner and knowing the good times to drop down.
Sword Sigma now has double the durability and still fails almost as bad as Magikarp. Up the wall, let him bounce of your wall twice, fall down and shoot him, jump up and shoot him, repeat. Yawn.
Velguarder Sigma was fun, as I touched up my skills on him. Wish he didn't take so long to get to. Just keep calm and stay in the centre and he's really not bad at all, you just have to be really perfectionistic since you have to hit him 32 times before he hits you twice. Ended up perfecting him. Still have no idea how anyone finds him better than MMX2's final. ^_^~
Think I'm done with the game for a good while now. More MMX4 replays await. And MMX5!
Apollo Justice - Stuff. Case 2, near the end. Mmmhmm, not going to post thoughts yet.