The problem stems from the mismatch of constants at the top of maps/GoldenrodCity.asm
const_value set 2
const GOLDENRODCITY_POKEFAN_M1
const GOLDENRODCITY_YOUNGSTER1
const GOLDENRODCITY_COOLTRAINER_F1
const GOLDENRODCITY_COOLTRAINER_F2
const GOLDENRODCITY_YOUNGSTER2
const GOLDENRODCITY_LASS
const GOLDENRODCITY_GRAMPS
const GOLDENRODCITY_ROCKETSCOUT
const GOLDENRODCITY_ROCKET1
const GOLDENRODCITY_ROCKET2
const GOLDENRODCITY_ROCKET3
const GOLDENRODCITY_ROCKET4
const GOLDENRODCITY_ROCKET5
const GOLDENRODCITY_ROCKET6
const GOLDENRODCITY_POKEFAN_M2
and the number of object_events at the bottom of the file
The problem stems from the mismatch of constants at the top of maps/GoldenrodCity.asm const_value set 2 const GOLDENRODCITY_POKEFAN_M1 const GOLDENRODCITY_YOUNGSTER1 const GOLDENRODCITY_COOLTRAINER_F1 const GOLDENRODCITY_COOLTRAINER_F2 const GOLDENRODCITY_YOUNGSTER2 const GOLDENRODCITY_LASS const GOLDENRODCITY_GRAMPS const GOLDENRODCITY_ROCKETSCOUT const GOLDENRODCITY_ROCKET1 const GOLDENRODCITY_ROCKET2 const GOLDENRODCITY_ROCKET3 const GOLDENRODCITY_ROCKET4 const GOLDENRODCITY_ROCKET5 const GOLDENRODCITY_ROCKET6 const GOLDENRODCITY_POKEFAN_M2
and the number of object_events at the bottom of the file
Attempting to make GOLDENRODCITY_POKEFAN_M2 disappear tries to make an invalid event disappear and causes the map to load broken.
Either restoring Rocket 5 or removing his constant should fix the issue.