Hidden Machines (HMs) in Black 2/White 2
Pokémon Black 2 & White 2 retain the same six HMs from Black/White, but as the Unova Pokédex is greatly expanded there is much more choice for HM users. Unlike BW, most HMs in BW2 are required at some point complete the main storyline. There are also many side areas where items or Pokémon can be found, for example a section of Route 23 just prior to Victory Road has a Strength puzzle giving access to several trainers. Flash remains a TM but is useful in several caves. Dive is once again used for the Abyssal Ruins underneath Undella Bay (more details & map).
The Pokémon can be filtered by ticking the checkboxes. This is useful for deciding on an
HM Slave - a Pokémon knowing only HM moves, to save all four spots for good moves on other Pokémon.
Where to find the HMs in Black 2/White 2.
Pokémon HM chart