Level/Manga

The concept of levels appears to be present within some manga (but not all of them).

In The Electric Tale of Pikachu manga
The concept of levels appears rarely in the The Electric Tale of Pikachu manga; however, in Pikachu's Excellent Adventure, Samurai specifically mentions level 99 and  which can be found in the Hidden Village.

In the Pokémon Adventures manga
At the end of every, or starting from , at the end of certain s, the current levels of at least one of the main characters' Pokémon are given in a Pokédex or Adventure Map section.

The level mechanic appears in the plot twice. In the, Orm's black Pokédex was able to deduce the power of 's Pokémon in terms of level; Yellow then used her own mysterious power to sharply raise her team members' levels. In the, found out that the  he used during his Battle Factory challenge, and later smuggled out, was able to survive an opposing 's ; Sceptile was Level 51, even though Emerald's challenge was in the Level 50, Single Battle mode, meaning that the rest of the rental Pokémon were Level 50.

In the Pokémon Gotta Catch 'Em All manga
The concept of levels seems to exist in Pokémon Gotta Catch 'Em All, as in Catch Bellsprout!, Shu comments that the he is battling against is at a higher level than his.