- Base-Breaking Character: Arceus. To some, he's cool and genuinely tragic, while to others, he's a whiny Jerkass with an annoying voice.
- Complete Monster: In the manga retelling by Makoto Mizobuchi, Marcus/Markus lacks the good intentions of his anime counterpart, resulting in a power-hungry monster. Upon learning of Damos acquiring the Jewel of Life from Arceus, Marcus decides to steal it for himself. He plans to do so by using his Bronzong to hypnotize Damos and lure Arceus into a trap, then have all of his Electric-type Pokémon—all of whom, most prominently Heatran, are under his control due to special armor, with those who try to rebel subject to beatings—electrocute it to death. The initial plan failed, with Arceus retaliating by obliterating everyone in the temple, Marcus included. When the heroes of the present travel to this era to prevent the event from taking place, Marcus decides to manipulate them into helping him and improve on his trap. He would pour Silver Water onto Arceus, while his Pokémon would carry out their usual commands. When the heroes learn of this, they tried to warn Marcus that his action will damage the space-time continuum, only for him to say he doesn't care, that he's even glad even to see this happen as it would make him him feel like a god, and has his Pokémon and soldiers kill them when they try to stop him. When they manage to foil his plan, he kills himself, activating a mechanism which upon his death would collapse the temple and kill everyone inside it, meaning his last act would cause the deaths of, at the very least, possibly hundreds of Pokémon and human alike.
- Creator's Pet:
- The spikey-eared Pichu, which would go on to become a Promotional Powerless Piece of Garbage in HeartGold and SoulSilver (which even swiped Celebi's place from the original games' Ilex Forest shrine event).
- Seriously, you could remove Pichu and replace her with another small Pokémon, and everything would still turn out the same. To make matters worse, the poster of the film displays her like a main cast member, even though she has very little screen time than that of other (more notable) Pokémon.
- Descended Creator: According to ADR director Tom Wayland, Arceus was originally going to be voiced by actor Vincent D'Onofrio of Full Metal Jacket and Men in Black fame. However, before his recording session, there were difficulties with D'Onofrio's agent and he was unable to record for the movie. After re-auditioning, Tom Wayland himself was chosen to voice Arceus instead.
- Hilarious in Hindsight:
- When Sheena tells the heroes about a legend involving a young trainer with an electric Pokémon, Dawn automatically assumes it's referring to Ash. He isn't so quick to agree however, probably because of what happened the last time he Jumped at the Call.
- Some people said that Marcus was the human version of Shadow the Hedgehog when the movie was still in Japan, thanks to their similar appearances. The English dub then had Jason Griffith (the English voice of Shadow from 2005 to 2010) voice Marcus.
- Iron Woobie: The Creation Trio, particularly (and literally) Dialga. The three of them stand up against what is essentially their parent (and a literal God) to stop him from destroying humanity, and get repeatedly knocked down, with Dialga being the last man standing.note
- Just Here for Godzilla: There's a part of the audience that skips most of the story just to see the Creation Trio battle against Arceus.
- Obvious Judas: Marcus's role as the Big Bad is meant to be a twist. One look at his obviously evil-looking design (a design which no-one else in the movie matches), however, and you already know Damos isn't the (only) one to blame.
- They Wasted a Perfectly Good Plot:
- At one point in the future, Team Rocket stumble across the real Jewel of Life as Arceus battles above them. You'd think that they'd try and use it to bait Arceus and get him under their control (or at least get him to cease his "judgement"). Instead they fumble around, do nothing with it and by the end the Jewel fades away thanks to the Timey-Wimey Ball. They might as well have never found the sodding bauble to begin with.
- At least one critic persuasively argues that the Damos plot would be significantly more compelling if he had originally given in to temptation and refused to return the Jewel of Life, a good man betraying his morals for the sake of what he believes is a Necessary Evil. Such a plot would also have made Marcus a bit more compelling and three-dimensional, using him first as a Devil's Advocate, and later, to try swiping the jewel himself in the endgame.
- What an Idiot!:
- Ash, Dawn, and Brock doing nothing but standing there as Kevin explicitly orders them to escape as Giratina is in the distance fighting Dialga. Then Ash impulsively runs into the lake to get to Giratina. Granted, Giratina doesn't hurt him, but it was still a pretty dumb move when up against the enraged, 14ft tall Eldritch Abomination.
- Sheena tells the Obviously Evil Marcus about exactly what is going to happen when Arceus doesn't get the Jewel of Life back. With almost no suspicion regarding his motivations, especially when he looks like Jafar's second-rate cousin and the kind of guy who'd be most likely to backstab a god. This results in nearly getting herself and her friends erased from time. Great jorb, buddy.
- WTH, Casting Agency?: Large Ham extraordinaire Dan Green voices Damos, but some would prefer him to be Arceus' English voice as opposed to the nasally, whiny drag-queen voice provided by Tom Wayland.
YMMV / Pokémon: Arceus and the Jewel of Life