Listed every area's highest level pokemon in order of the walkthroughs are going.
Made 2 chart for every generation: one for the wild pokemons, one for the trainer-used pokemon.
Yet not tried to figure out how to mark totem pokemons for the ultra-games.
Also, no idea how the switch-games work, I heared they don't even have trainers in the anymore, so
Gen 1 has the most unique pattern, making a layed S-figure, and things are all-over the place.
Gen 2 is obviously way too flat, the wild pokemons making everything even worse.
Gen 3 seems to plateau its levelcurve right to the point of The League, where the difficulty spikes. There's also the postgame spike too.
Gen 4 is an interresting case. The trainer-battles seem to be in order, mostly, but it's like the game does not want you to bother with wild pokemons.
Gen 5-1 has obviously problem: the line doesn't really crawls up, and even flatlines around halfway. And The League's level is obviously crawling down.
Gen 5-2 seems to tried to fix 5-1 being way too easy, but its difficulty-graph being a straight line tells this game is still boring.
X/Y is just too easy. Nothing else to add there.
For the Ultra-games I feel the graph would tell more if the graphs would be scaled to the same X-Y length, and would benefit from showing the totem-spikes, which are bigger in actuality for their omni-boosts. It seems to be obvious though it's not just the levels anymore, but number and quality of the trainer parties.
Made 2 chart for every generation: one for the wild pokemons, one for the trainer-used pokemon.
Yet not tried to figure out how to mark totem pokemons for the ultra-games.
Also, no idea how the switch-games work, I heared they don't even have trainers in the anymore, so

Gen 1 has the most unique pattern, making a layed S-figure, and things are all-over the place.
Gen 2 is obviously way too flat, the wild pokemons making everything even worse.
Gen 3 seems to plateau its levelcurve right to the point of The League, where the difficulty spikes. There's also the postgame spike too.
Gen 4 is an interresting case. The trainer-battles seem to be in order, mostly, but it's like the game does not want you to bother with wild pokemons.
Gen 5-1 has obviously problem: the line doesn't really crawls up, and even flatlines around halfway. And The League's level is obviously crawling down.
Gen 5-2 seems to tried to fix 5-1 being way too easy, but its difficulty-graph being a straight line tells this game is still boring.
X/Y is just too easy. Nothing else to add there.
For the Ultra-games I feel the graph would tell more if the graphs would be scaled to the same X-Y length, and would benefit from showing the totem-spikes, which are bigger in actuality for their omni-boosts. It seems to be obvious though it's not just the levels anymore, but number and quality of the trainer parties.