This game was my childhood, I used to play it every day after school. Just recently it popped into my mind and I redownloaded it. Let me tell you, this game is so fun!!! It’s tough at first, and many of the reviews are complaining about overpowered characters, but that’s the fun in the game, plus I have a guide to get up to that “over powered” level. First, I start by unlocking Argentina, the one with the fire dragon shot, you on lock them by winning against 12 characters in the arcade without using your power shot, relatively easy. Next, I use them to unlock Germany by beating 12 arcade characters without letting them score a goal, a tough challenge, but definitely doable. Germany is probably one of the best characters in the game imo, if you jump and use his shot, it’s almost certain to go in. From there you could unlock Spain to unlock India, to dominate fight mode, or you could just win league after league and rack up points. Honestly, the game is pretty hard without a mid tier character like Germany, but once you get going, it’s hard to stop.
TL;DR unlock Argentina so you can unlock Germany, a character who makes the game easier.