Code point
U+331E
Glyph appearance depends on your fonts.
U+331E
So<square> 30B3 30FC 30DDU+331E SQUARE KOOPO is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+331E
13086
㌞
㌞
E3 8C 9E
331E
0000331E
%E3%8C%9E
\u331E
\u331E
\u331E
\331E