Mega Man Star Force is a gem from the Nintendo DS (Considering I never played Battle Network) as it has a great story, with nice and great characters (just has a bit of filler in certain parts), a great, beautiful (but small) Soundtrack, and a great Gameplay, as it revolves about dodging the enemies attacks and attack at the correct moment with your cards to destroy the enemies, and even if it doesn't have a level up system (Games that comes to mind could be like, Paper Mario Sticker Star) at least Money is useful here and the battles are so fun that I wasn't running away from battles often, the unique down side could be his difficulty when you replay the game, as it is so much easier now than you probably started, touch controls, a problem if you play the game in not original hardware, and the splitting of content, that, even if is small (mostly the transformations), is still something
But hey I didn't talk about what DX brings, DX is a patch for Mega Man Star Force that tries to make the game feel more like his Star Force 3 counter-part, with some Quality of Life improvements, and the combination of all the content that was splitted between the 3 versions being united into one game, and of top of that it adds extra content, like bringing some cards that were just part of the Japanese Version, an extra save slot, and the most important one, if you want to have more replayibility out of the game, Legend Mode is the way to go, beause is a mode (that can be activated in any moment) that makes the game harder in his own way
Without a doubt, if you played the original Star Force, or you are new to this series, DX is for you, as it gives something to the experiment players, and Quality of life changes for people who want to experience this game for the first time