It is possible to shoot upwards from the ground then immediately as the shot is leaving the screen, press up and jump to shinespark without delay. A Charge shot can help, as it slows down the shot.

Requires:

"canHeroShot"
{
  "canShineCharge": {
    "usedTiles": 33,
    "openEnd": 2
  }
}
{
  "heatFrames": 250
}
{
  "shinespark": {
    "frames": 22,
    "excessFrames": 3
  }
}