The story about a boy and his blob... wait, wrong game!
The story is almost non-existent beyond the main premise: A pink monster, Baby, arrives before Knight and then a mystical old man magically appears out of thin air and tasks Knight with escorting Baby to God's Tower. Knight is a mute hero that has no character development, the fairy that accompanies him has no development, and Baby has little development. There's a few side-characters that do evolve, or rather change due to circumstances, but nothing major or noteworthy. Basically, the storyline, what little there is, is dull and forgettable while characters remain lifeless constants, which makes for a very forgettable JRPG.
Amusingly, they went for a virtual-pet-like system for Baby. For instance, in battle he will act by himself, although you can order him to focus on attack, defense or supporting you. While outside of battle, you can feed him different items to raise the invisible 'Happiness' gauge, or feed him Weapons and Armors to raise his defense and attack power. I couldn't be bothered to keep Baby happy, so I just fed him my old armors and weapons to raise his stats, or the few items that exist exclusively to be fed to Baby, like bugs and gum. It's not like an unhappy Baby won't aid you, but you won't be able to order him to transform, a trade-off I was willing to pay.
So far, I've presented a very forgettable and generic game, but what really kills it is the lack of directions. There's a couple of times in which the game won't give you directions and just expect you to travel around the sea, or air, until you come across the next event. This is not a matter of needing handholding, this is a relatively linear JRPG, and having the player wandering around without hints is beyond stupid.
Bottom-line is: Guardian's Crusade hasn't aged well. At the time of its release, it was probably a mediocre and unimpressive game, but by today's standards the game shows its age and it ain't pretty. Even JRPG aficionados like myself will have a hard time finding things to like about this game.
4.0 out of 10