History of character has not yet been written.
- As a rapidly growing child, Ultra is developing quickly over time and his powers as well as his physiology are constantly changing.
- 11 Appearances of Ultra (Prime Earth)
- 8 Images featuring Ultra (Prime Earth)
- 1 Quotations by or about Ultra (Prime Earth)
- Character Gallery: Ultra (Prime Earth)
- Ultra the Multi-Alien at dccomics.com
- Ultra the Multi-Alien at Wikipedia.org
- Ultra, the Multi-Alien at the Comic Book Database
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