There are 4 hidden characters in the game that you can unlock but there is still another secret in this game and that is a stage that you can unlock called "Mushroom Kingdom" where in able to unlock it you must be the 1P mode with all 8 original characters and then play all the multi-player stages at least once to unlock this level. There are also 2 final hidden things inside the game but they aren't really important to the game which are and Item Switch menu and a Sound Test menu, the item switch is un lockable by playing 100 vs matches and to unlock the Sound Test you have to complete both Bonus Stages 1 & 2 with all 12 characters.

marc3300 : Not sure why the dislike if your info is correct...but I think maybe you could've explained how to unlock the 4 secret characters since you brought them up in the first place. You'll get a like from me, just because what you DID post is correct.

MysteryMan007 : I don't know how to unlock them.

The rules of this tread is that strategy guides have to be at least 400 words at minimum. This one is only 124 words. I understand, since this is your first strategy guide, but next time read the rules first. The rules are right here. You could maybe talk about the strategies to beat opponents with each character. Now about unlocking characters, do your research. It becomes plagiarism when you copy the information, but if you put the link where you got the information (as long as the majority of your guide is original), you should be fine. Of course, you can always try to unlock the characters and then use your experience to explain how to unlock the characters.

If you don't know how to unlock them, why make a strategy guide for it? Also, you could have just looked it up.

To follow up on Lunar, most people make strategy guides of games that they know extremely well. That doesn't mean that they know EVERYTHING there is to know about the game, that means that they are familiar with the game and want to help other people who may not know as much about the game as they do. That normally means that the guide is long. Now, length does not equal quality, but most good walkthrough/strategy guide writers add relevant information that in turn helps the person reading the guide. Also, that is why most people take a long time to write game guides. They also tend to write the guide in a word document and then format it here due to a little glitch about long posts. This guide seems like it was rushed. Accurate, yes, but rushed. Point is, this guide could be a LOT better if you put more time into it. 

Didn't see this until after I posted, so I edited. The grammar in this guide also makes it a bit hard to read, sometimes, and that could have the Viz and CP from this guide revoked. You really should proofread the guide before you post it, and if you didn't catch a grammar/spelling mistake until after you posted, please edit your guide.