The only actual upgrades in Tallon Overworld are space jump and X-ray visor. There are also numerous missile expansions and energy tanks as well as two Chozo artifacts
The grapple beam isn't located in Tallon Overworld. It is actually in the Phazon Mines. It is in a little room at the top of the Ore Processing Room. If you haven't gone beyond Tallon Overworld yet, then you have a long way to go before you get it.
The first entry to phazon mines is beyond the space pirate frigate wreckage in tallon overworld
Chozo do not physically appear, but Chozo Ghosts actually appear in areas of the Chozo Ruins and Tallon Overworld after they are encountered in the Hall of the Elders (found in the Chozo Ruins).
Don Tallon was born in 1916.
Don Tallon died in 1984.
Roger Tallon was born in 1929.
Roger Tallon died in 2011.
Robin Tallon was born in 1946.
Maurice Tallon was born in 1906.
Franck Tallon has written: 'Franck Tallon' -- subject(s): Catalogs, Commercial art
William Tallon died on 2007-11-23.
Ben Tallon is 6' 1 1/2".