There is no character development, their relationships are vague. It's 49 episodes of nothing but the monster of the week. Background stories are told through poorly executed flashbacks or rushed in a way that doesn't make sense, considering that 49 episodes are enough to develop a story.
Besides, there are even huge plot holes, as we can see in episode 43. The episodes ago the robots were thrown into space time on Jupiter, but in ep 43 they show them coming to earth in the era of dinosaurs (when they existed) and they were underground for all this time. What's the point? Look at the size of the plot hole...
How did they end up in the age of dinosaurs in the same timeline as everything is happening? They wrote this episode with their asses and didn't think.
The ending is stupid. The protagonist simply leaves Earth because a threat can appear at any time in the universe. Couldn't he just stay on Earth? Where did he go? Are you going to be wandering the universe inside a robot? They simply did it to make it look sadder, but it's just poorly written.
The author of this work also made Brigadon and Betterman, I don't know how I expected any quality from this.
The animation is good, but every episode repeats the same transformation and that annoys me. There are episodes where the same transformation happens twice.
The penultimate episode is just a shitty recap episode. Seriously?
There's really nothing to praise about this anime. It wastes time just being the monster of the week instead of wanting to tell something. Like I said, when it tries to tell something, it's rushed and vague. Even the villains themselves were created with a stupid and poorly made excuse. They say this anime is the Gurren Lagann of the 90s, now I understand why it's so horrible (it manages to be worse than Gurren Lagann).
