I am attempting to use wordpress_enqueue_script on my small theme, to place 3 javascript files on my small page.

function mr_forms() {

            wp_register_script('validate-jquery',  get_bloginfo('template_url') . '/js/jquery.validate.min.js', array('jquery'),FALSE,TRUE);
            wp_enqueue_script('validate-jquery');
            wp_register_script('aditional-methods', get_bloginfo('template_url') . '/js/additional-methods.min.js', array('jquery','validate'),FALSE,TRUE);
            wp_enqueue_script('aditional-methods');
            wp_register_script('messages-ptbr', get_bloginfo('template_url') . '/js/messages_ptbr.js', array('jquery','validate'),FALSE,TRUE);
            wp_enqueue_script('messages-ptbr');
            wp_register_script('forms', get_bloginfo('template_url') . '/js/forms.js', array('jquery', 'maskedinput'), FALSE, TRUE);
            wp_enqueue_script('forms');
        }

        add_action('init', 'mr_forms');

Only the final javascript, "forms.js" has been placed on my small page, others arent, does anybody understand what may be happening ? and also the other does not matter...

Perhaps you have named validate improperly within the other register scripts? Ought to be validate-jquery rather than validate?

function mr_forms() {

        wp_register_script('validate-jquery',  get_bloginfo('template_url') . '/js/jquery.validate.min.js', array('jquery'),FALSE,TRUE);
        wp_enqueue_script('validate-jquery');
        wp_register_script('aditional-methods', get_bloginfo('template_url') . '/js/additional-methods.min.js', array('jquery','validate-jquery'),FALSE,TRUE);
        wp_enqueue_script('aditional-methods');

wp_register_script('messages-ptbr', get_bloginfo('template_url') . '/js/messages_ptbr.js', array('jquery','validate-jquery'),FALSE,TRUE);

        wp_enqueue_script('messages-ptbr');
        wp_register_script('forms', get_bloginfo('template_url') . '/js/forms.js', array('jquery', 'maskedinput'), FALSE, TRUE);
        wp_enqueue_script('forms');
    }

    add_action('init', 'mr_forms');