There are four puzzles near the Ruins of Alph, that let you catch different types of Unown.
To catch all 26 Unown forms, you need to solve all four puzzles. Each puzzle has to be
put toghter to make a Pokémon.
Kabuto: The first and easiest of the four
The second of the four, a little bit harder
The third puzzle
You don't now where which end is 'till you've finished