What pen can be used to write on basketball?

Gel pens and markers.

1. Gel pen. Ballpoint pens whose writing medium has a viscosity between water-based and oil-based are called gel pens; gel pens originated in Japan and are a novel writing instrument that is currently popular internationally. Gel pens have the advantages of both fountain pens and ballpoint pens. They have a comfortable writing feel, lower ink viscosity, and added substances that are easy to lubricate, making them smoother than ordinary oil-based ballpoint pens. It is an upgraded product of oil-based ballpoint pens.

2. Marker pen. Marker pen, also known as marker pen. It is a drawing colored pen specially used for writing or painting. It contains ink itself and usually has a pen cap attached. It usually has a hard tip. The paint in markers is volatile and is used for quick, one-time drawings. Often used in design items, advertising slogans, posters or other art creations. Can draw thicker lines with little change. Box-tipped pens are a type of marker pen.