For a Pokémon Platinum Nuzlocke challenge, some players may choose to apply an additional rule, such as a level cap or a "no overleveling" rule, to make the challenge even more difficult. However, the traditional Nuzlocke rules do not include a level cap.
The Elite Four presents a significant level jump. There are two common ways to handle these caps : Set all team members to Level 59 ( pokemon platinum nuzlocke level cap