Beldum
Overview
Beldum can be a very strong classic carry for Pokerogue, but it has a few key weaknesses.
Strengths
It is a powerful slow tank that can take hits from many strong attackers. It is also really good against Rayquaza,
Weaknesses
It is completely horrendous early game with no unlocks, if it has a bad nature, or Ivy/Finn has a fire starter, your run is most cooked, it can also struggle against Eternatus.
Recommended build
An Attack or Defense boasting nature is a very good idea, if you want it to go up against the boss then stack up an zinc.
Moves & abilities
It is really important to give this thing any viable moves as soon as possible be that TMs or just feeding it rare candies until it evolves.
Strategy
If it has no egg moves no nothing, then just keep it on the sidelines until it evolves. It is a really viable Pokemon in the mid game too. Once you get into the late game you want to get some sort of ice coverage (like ice punch) and relearn zen headbutt (if you ever forgot it) for Ivy/Finn and Etern.