By Arrran Weeviling, using old templates from the Minecraft Wiki, I'm unsure if it'll actually work given the mcwiki one required some extra code elsewhere.
This template displays a sprite from the following sprite sheet.
Put the number in this code {{User:Arrran Weeviling/8 bit sprites|##}}:
Item
| Code | Result | Name |
|---|---|---|
| 1 |  |
Aperture |
| 2 | |
From the depths of the Multiverse |
| 3 | |
Portal logo dude |
| 4 | |
White Panels #1 |
| 5 | |
White Panels #2 |
| 6 | |
Black Panels #1 |
| 7 | |
Black Panels #2 |
| ... | ||
| 64 | |
Beeg Platt (an old sprite of an OC |