These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The final training sequence we see for who will be the next pilot involves the candidates navigating a "Rattle Room", which is a room filled with a giant jungle-gym like field of bars overhead, which they have to climb as the room flashes and shakes and sirens go off, in order to climb through a hole in the ceiling. The bars are also rigged with traps like growing red-hot on contact or falling away when they use them for support. How does any of this test factor into piloting a giant robot? Your guess is as good as ours.
The robots fly into space, Alexander shoots a missile into Achilles's foot, and he crashes back to Earth with Alexander in tow, even landing back on the field. The sequence takes about two-three minutes and serves no purpose but to have Alexander blow up Achilles's foot, which surely could have been accomplished in any other number of ways with them on the ground.
Cult Classic: At the time it was panned by critics and was a box office bomb. These days, many remember it fondly.
Evil Is Cool: The Confederates arm their robots with chainsaws, rocket fists, mace-arms, and eventually give them four legs, while the Market gives their robots a wrist-mounted arm torch, blinding flares, and allow them to transform into tanks. Tight call on who has the advantage in coolness. On the other hand, Alexander is infinitely more memorable than Achilles on account of being a Faux Affably EvilLarge Ham.
Foe Yay: Alexander seems a bit too enthusiastic about fighting Achilles sometimes. After his 10-Minute Retirement, Alexander even greets him with "I never thought that I would say this...but I'm glad to see you. Very glad!"
Hilarious in Hindsight: Alexander finally disables Achilles's robot in the final battle by flipping it onto its back and revealing a chainsaw from his groin, which he uses to cut into the cockpit as he stands over it and kneels. The cockpits of the robots is in the approximate place of the robot's upper torso. In the rise of the internet area and the prominence of video games, we now recognize that Alexander is partaking in the typical ritual of victory by tea bagging over his fallen opponent. Extra funny because, if he knew what the gesture meant today, it would be entirely in character for him to do it.
Narm Charm: Narm and Humongous Mecha have always had a rather good relationship. The film is part sci-fi political epic, part giant robot kid's cartoon, and the silliness of it is part of the fun.
Vindicated by History: As noted above, the film was a critical flop that became a Cult Classic. Critically, reviewers began to take a second look at it in the new millennium, especially when Pacific Rim and Transformers were hitting theaters, and spoke of it favorably as a good early example of live-action mecha entertainment.
Visual Effects of Awesome: The stop motion model work is great, and the models obviously had a lot of time put into making them to give the robots lots of details that make them look very real.