| 2025-10-22 17:43:06 | dipswitch | Added credit for Harlekin on Bugs Bunny Crazy Castle 4 +5: Code (Trainer) |
| 2025-09-25 00:28:31 | dipswitch | Updated Harlekin's membership of Divide By Zero: set as ex-member |
| 2024-11-02 08:19:31 | menace | Updated Harlekin's membership of Capital: set as ex-member |
| 2021-10-29 00:50:37 | dipswitch | Added Harlekin as a member of Divide By Zero |
| 2021-10-29 00:50:29 | dipswitch | Added credit for Harlekin on DGB-MAX v1.0: Code |
| 2020-12-04 09:17:32 | menace | Added credit for Harlekin on The Muppets +4: Code (trainer) |
| 2013-04-07 18:50:30 | dipswitch | Added credit for Harlekin on Monthly Gameboy Scene Charts International 8 (07/2000): Other (Editor) |
| 2013-04-07 18:44:40 | dipswitch | Added credit for Harlekin on Monthly Gameboy Scene Charts International 6 (04/2000): Other (Editor) |
| 2013-04-07 18:42:03 | dipswitch | Added credit for Harlekin on Monthly Gameboy Scene Charts International 5 (03/2000): Other (Editor) |
| 2013-04-07 18:34:49 | dipswitch | Added Harlekin as a member of MGSCI Staff |
| 2013-04-07 18:33:59 | dipswitch | Added credit for Harlekin on Monthly Gameboy Scene Charts International 4 (01/2000): Other (Editor) |