Cyber Akuma and his booster rocket had me all F’ed up at first but once I got the hang of the game I took akuma and absolutely wrecked him every single time. Good times. Have an Anbernic handheld and play this all the time
Onslaught was such a tough battle that when I first played vs Cyber Akuma, I beat him in my first attempt. He set the standard of boss fights for me. Also, I noticed Onslaughts' health went down super fast. Took me a while to remember that on Mame, you had the in-game difficulty, which could be boosted by cabinet difficulty. Though if you're going to play with Megaman I remember that he was too short for a lot of Onslaughts first form attacks to hit