create alias onepunch_man -> one_punch_man
create alias onepunch-man -> one_punch_man
create alias one-punch_man -> one_punch_man

Link to request

This, to me, seems the most visually neutral format for the tags, in light of varying compounds and hyphenations. This double-spaced format is, at least, seen during the anime's commercial bumps, to justifying using it at all.

EDIT: Preference to NWF_Renim's request below.

In topic #12171 agreement seemed to be in the direction of using one-punch_man.

The bulk update request #470 has been rejected.

create alias onepunch_man -> one-punch_man
create alias onepunch-man -> one-punch_man
create alias one_punch_man -> one-punch_man

Link to request

The bulk update request #477 has been approved.

create alias saitama_(onepunch_man) -> saitama_(one-punch_man)
create alias fubuki_(onepunch_man) -> fubuki_(one-punch_man)
create alias king_(onepunch_man) -> king_(one-punch_man)
create alias bang_(onepunch_man) -> bang_(one-punch_man)
create alias doutei_(onepunch_man) -> doutei_(one-punch_man)
create alias garou_(onepunch_man) -> garou_(one-punch_man)
create alias yamazaru_(onepunch_man) -> yamazaru_(one-punch_man)
create alias matsuge_(onepunch_man) -> matsuge_(one-punch_man)
create alias snake_(onepunch_man) -> snake_(one-punch_man)
create alias sea_king_(onepunch_man) -> sea_king_(one-punch_man)
create alias bearded_staff_(onepunch_man) -> bearded_staff_(one-punch_man)
create alias d-pad_(onepunch_man) -> d-pad_(one-punch_man)
create alias stinger_(onepunch_man) -> stinger_(one-punch_man)
create alias forte_(onepunch_man) -> forte_(one-punch_man)
create alias red_nose_(onepunch_man) -> red_nose_(one-punch_man)
create alias glasses_(onepunch_man) -> glasses_(one-punch_man)
create alias hyottoko_(onepunch_man) -> hyottoko_(one-punch_man)
create alias butcher_(onepunch_man) -> butcher_(one-punch_man)
create alias beast_king_(onepunch_man) -> beast_king_(one-punch_man)
create alias blue_fire_(onepunch_man) -> blue_fire_(one-punch_man)
create alias zenko_(onepunch_man) -> zenko_(one-punch_man)

Link to request

Qualified characters (including deleted posts).

The following have zero hits:
alias drive_knight_(onepunch_man) -> drive_knight_(one-punch_man)
alias blast_(onepunch_man) -> blast_(one-punch_man)
alias pig_god_(onepunch_man) -> pig_god_(one-punch_man)
alias tatsumaki_(onepunch_man) -> tatsumaki_(one-punch_man)
alias mosquito_girl_(onepunch_man) -> mosquito_girl_(one-punch_man)
alias sonic_(onepunch_man) -> sonic_(one-punch_man)

create alias terrible_tornado -> tatsumaki
create alias silverfang -> bang_(one-punch_man)
create alias child_emperor -> doutei_(one-punch_man)
create alias drive_knight -> kudou_kishi
create alias pig_god -> butagami
create alias superalloy_blackluster -> chougoukin_kurobikari
create alias watchdog_man -> bankenman
create alias flashy_flash -> senkou_no_flash
create alias tank-top_master -> tanktop_master
create alias metal_bat -> kinzoku_bat
create alias puri-puri_prisoner -> puri_puri_prisoner
create alias handsome_kamen_amai_mask -> ikemen_kamen_amaimask
create alias hellish_blizzard -> fubuki_(one-punch_man)
create alias license-less_rider -> mumen_rider
create alias speed-o'-sound_sonic -> onsoku_no_sonic

Link to request

Taken from the second anime trailer

From what I understand, the manga and English adaptations of both have alternate names for some, including matters of spacing/hyphenation/what-have-you. So, in my ignorance, I've only put these without qualifiers to their standing tags (assuming the *_(one-punch_man) alias are approved).

The bulk update request #503 has been approved.

The bulk update request #504 has been approved.