Pokémon GO players from the United States are on a constant pursuit to catch all Pokémon from the country, and there is one perseverant gamer who accomplished the feat and caught 'em all.

Meet Nick Johnson, a Brooklyn-based player who proudly announced recently that he caught every one of the 142 Pokémon on U.S. territory.

You should know that the original video game that Pokémon GO is built on features a total of 151 monsters. Out of those, 142 separate creatures in Pokémon GO are available for catching in the United States, three are available to certain international regions and the fate of the final six is shrouded in mystery.

The man who caught all 142 Pokémon GO monsters stateside announced his success on Reddit with a simple message.

"I caught every Pokemon currently available in the United States," wrote Johnson, who goes by the redditor name ftb_hodor.

Business Insider talked to Johnson and found out details about his experience of catching 'em all.

Johnson is at the helm of startup Applico and has recently published a book, meaning that his time for Pokémon hunting was very restrictive during the day. That is why he chose to take on the quest of Pokémon catching after 6:30 p.m., as he left his office.

According to Johnson, his hunting episodes would last up to eight hours straight, after which all he could do is go home and hit the hay. He notes that his Health app indicates an average of 8 miles walked per day in the two weeks since the game's release.

The gamer was kind enough to share some high points and hints from his Pokémon GO adventure.

- As his first Pokémon, he selected water-type Squirtle, but it was by mistake rather than design. You see, Johnson did not realize that he could switch from Squirtle to fire-type Charmander or even the famous Pikachu.

- As the last Pokémon he needed to complete his panoply was Omastar, he evolved it himself. He mentions that if Verizon's cell service stayed on during the previous day, he could have caught Omastar somewhere in his vicinity.

- Johnson mentions that he found the second to last Pokémon as the hardest to catch. To hunt down Porygon, he had to go all the way to Jersey City. He says that hailing in an Uber was very helpful to catch the monster in due time.

- He shares from his experience and guides players toward Grand Army Plaza in Central Park and Battery Park, which he claims are the best hunting spots in New York City. Based on his observations, the former is where crowds of minimum 300 people mash up for Pokémon hunting purposes.

- "Buy some good walking shoes," Johnson advises ambitious Pokémon masters. Speaking of investments, he underlines that buying egg incubators is the best in-game purchase a player can make.

When asked about his upcoming plans, Johnson says that he intends to keep playing Pokémon GO and hopes that the gaming company behind it will revamp the battle system so that it adds more fun to the title.

We are curious: how many monsters did you catch so far? Let us know in the comments section below.