Ash Ketchum is  a 10-year-old Pokémon Trainer from Pallet Town in the Kanto region ,that has always dreamed of becoming the world's greatest Pokémon Master.

Pikachu  is a electric-type Pokémon.Pikachu  was Ash's Starter Pokémon,given to him by Professor Oak.

In the world of Pokémon, boys and girls at the age of 10 can get their official license to become Pokémon trainers, and Ash Ketchum of Pallet Town is about to receive his very first Pokémon from Professor Oak. 

On the morning of the day that he is supposed to get his first Pokémon, it is revealed that Ash has accidentally broken his alarm clock and oversleeps.

When he wakes up, he runs in his pajamas to Professor Oak's laboratory.

Ash runs into his rival and the Professor's grandson, Gary Oak. Gary proceeds to taunt Ash for arriving to the ceremony late and brags about having already received his first Pokémon.

 When Ash enters Professor Oak's lab to receive his Pokémon, he is told that all three starter Pokémon have already been taken. 

Ash pleads for any Pokémon and Oak replies that he still has one left.

 Ash does not care and receives the Pokémon, which turns out to be the electric-type Pokémon Pikachu.

Ash thinks that it is cute, but it gives him an electric shock when he picks it up to hug it.

Oak gives Ash a Pokédex and six Poké Balls before he heads out on his journey to become the greatest Pokémon trainer of all time.

Ash soon comes to realize that the Pikachu refuses to go inside his Poké Ball and prefers his independence. As Ash carries the reluctant Pikachu, he hopes that they can be friends, but Pikachu acts aloof and openly shows his distrust of Ash.

Just then, the two stumble upon a Pidgey in the wild and Ash unsuccessfully tries to catch it by throwing a Poké Ball.

Ash uses his Pokédex and finds out that in order to catch a Pokémon.

With Pikachu being uncooperative, Ash tries to fight the Pidgey himself, but is easily beaten, which greatly amuses Pikachu.

The Pidgey escapes and Ash finds a Rattata rummaging through his pack. He chases the Pokémon off as he hears cooing behind him. 

He turns to see several Pidgey gathered in the tall grass. Frustrated, Ash throws a rock at what he believes is the Pidgey. However, it turns out to be a Spearow, which starts attacking Pikachu and Ash.